You have to wonder what the Chiefs were thinking when they let Bernard Pollard go. The Texans signed Pollard, and he instantly improved their anemic run defense.

Darren Sharper, FS, Saints. Age: 34. Re-signed with Saints (1 year)

Darren Sharper's age is a concern, but he still has one or two years left of top productivity. Sharper is one of the smartest defensive players in the NFL, and would be a huge upgrade for almost any secondary.

O.J. Atogwe (RFA), FS, Rams. Age: 29. Re-signed with Rams (5 years)

O.J. Atogwe was one of the few bright spots for the Rams defense this year. When he was placed on IR, St. Louis' ability to defend the pass went into the crapper.

George Wilson started 12 games because of injuries to other players, and Buffalo's defense didn't suffer at all. Wilson, who will play behind Donte Whitner and Jairus Byrd in 2010, could start for numerous other teams.